V. Feedback from the environment:
  1. 1. What particular sensory structures does the organism have? What advantage exists for that specific structure? Are there similarities to structures found in the other organisms?
    1. a. Pig: nose, ears, eyes, skin, tongue/mouth. It can see what is around it, it can hear things coming towards it etc, it can smells its surroundings, the skin protects the organs, the mouth allows it to eat and taste things.
    2. b. Starfish: pores, touch, & taste. It uses its skin to latch on things, lays on the ocean floor to wait for its prey, it blends in, it takes little particles through the pores.
    3. c. Crayfish: eyes, touch, mouth, antennas. It can see through its tiny eyes, it uses its claws to protect and get food, It’s antennas can tell when danger is around.
    4. d. Yes
    5. 2. How has evolution been part of their survival?
      1. a. They have changed their bodies so that they can live and protect themselves in the environment.
      2. 3. Follow the taxonomy of each of the organisms from kingdom to species.
        1. a. Kingdom-Animalia- starfish, crayfish
        2. b. Phylum-Chordata
        3. c. Class-Mammalia
        4. d. Subclass-Theria
        5. e. Infraclass-Eutheria
        6. f. Order-Artiodactyla
        7. g. Family-Suidae
        8. h. Subfamily-Suinae
        9. i. Genus-Sus - Pig



  1. 4. What are their cousins? What is one of their past ancestors (extinct) of which they share something in common?
    1. a. Pig: Hippos, wart hogs, pygmy hog
    2. b. Starfish: sea cucumber, irregular sea urchins, regular sea urchins
    3. c. Crayfish: lobsters, crabs, shrimp

Resources:
http://wiki.answers.com/Q/What_animal_is_closely_related_to_a_pig
http://wiki.answers.com/Q/Taxonomic_classification_of_a_pig
http://www.thepigsite.com/pighealth/article/10/sensory-systems
http://en.wikipedia.org/wiki/Starfish